Cap for a beam



FIG. 1 is an upper right side perspective view of my new cap design shown with a medial break to indicate that the cap may be of any length, the upper left side perspective view being a mirror image thereof;

FIG. 2 is a left side elevation view thereof, the right side elevation view being a mirror image thereof; and,

FIG. 3 is a bottom plan view thereof shown with the medial break. 

CLAIM The ornamental design for a cap for a beam, as shown and described. 